package com.eduservice.controller;


import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.commonutils.R;
import com.eduservice.entity.EduTeacher;
import com.eduservice.entity.vo.TeacherQuery;
import com.eduservice.exceptionhandler.GuliException;
import com.eduservice.service.EduTeacherService;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiModel;
import io.swagger.annotations.ApiOperation;
import io.swagger.annotations.ApiParam;
import org.apache.commons.lang3.ObjectUtils;
import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;

import java.util.HashMap;
import java.util.List;
import java.util.Map;

/**
 * <p>
 * 讲师 前端控制器
 * </p>
 *
 * @author testjava
 * @since 2022-05-24
 */

@Api(description = "讲师管理")
@RestController
@RequestMapping("/eduservice/teacher")
@CrossOrigin
public class EduTeacherController {

    @Autowired
    private EduTeacherService teacherService;

    @ApiOperation(value = "所有讲师列表")
    @GetMapping("findAll")
    public R list(){
        List<EduTeacher> list = teacherService.list(null);
        return R.ok().data("items",list);
    }

    @ApiOperation(value = "逻辑删除讲师")
    @DeleteMapping("{id}")
    //mapping后面的参数是url后面跟的 会被PathVariable拿到给形参id使用
    public R removeTeacher(@ApiParam(name = "id",value = "讲师id",required = true) @PathVariable String id){
        boolean flag = teacherService.removeById(id);
        if (flag){
            return R.ok();
        } else {
            return R.error();
        }
    }

    //3 分页查询讲师的方法
    //current 当前页 limit 每页条数
    @ApiOperation(value = "分页查询")
    @GetMapping("pageTeacher/{current}/{limit}")
    public R pageListTeacher(@PathVariable long current,
                             @PathVariable long limit) {
        //创建page对象
        Page<EduTeacher> pageTeacher = new Page<>(current, limit);
        //调用方法实现分页
        //调用方法时，底层封装，把分页所有数据封装到pageTeacher对象中
        teacherService.page(pageTeacher, null);
        long total = pageTeacher.getTotal();//总记录数
        List<EduTeacher> records = pageTeacher.getRecords();//数据list集合

/*        try {
            int i = 10/0;
        } catch (Exception e){
            //执行自定义异常
            throw new GuliException(20001,"执行了自定义异常处理");
        }*/


        Map map = new HashMap();
        map.put("total",total);
        map.put("rows",records);
        return R.ok().data(map);
        //这两种都可以
        //return R.ok().data("total",total).data("rows",records);
    }

    //4.条件查询带分页的方法
    //@RequestBody 使用json传递数据 把json数据封装到对应对象上面去 必须使用post提交 get取不到
    //required = false 表示值可以没有
    @ApiOperation(value = "条件查询分页")
    @PostMapping("pageTeacherCondition/{current}/{limit}")
    public R pageTeacherCondition(@PathVariable long current,
                                  @PathVariable long limit,
                                  //用对象形式得到条件 这个对象会在前端封装
                                  @RequestBody(required = false) TeacherQuery teacherQuery){
        //1.创建page对象
        Page<EduTeacher> pageTeacher = new Page<>(current,limit);

        //构建条件
        QueryWrapper<EduTeacher> wrapper = new QueryWrapper<>();
        //多条件组合查询
        //wrapper.
        //判断条件值是否为空，如果不为空拼接条件
        String name = teacherQuery.getName();
        Integer level = teacherQuery.getLevel();
        String begin = teacherQuery.getBegin();
        String end = teacherQuery.getEnd();
        if (!StringUtils.isEmpty(name)) {
            //构建条件 模糊查询
            wrapper.like("name",name);
        }
        //这里老师还是用的StringUtils，我报错为什么呢
        if (!ObjectUtils.isEmpty(level)) {
            wrapper.eq("level",level);
        }
        if (!StringUtils.isEmpty(begin)) {
            //构建条件 模糊查询
            wrapper.gt("gmt_create",begin);
        }
        if (!StringUtils.isEmpty(end)) {
            //构建条件 模糊查询
            wrapper.le("gmt_create",end);
        }

        //排序 按时间降序
        wrapper.orderByDesc("gmt_create");
        //调用方法实现条件查询分页
        teacherService.page(pageTeacher,wrapper);
        long total = pageTeacher.getTotal();
        List<EduTeacher> records = pageTeacher.getRecords();

        Map map = new HashMap();
        map.put("total",total);
        map.put("rows",records);
        return R.ok().data(map);

    }

    //5.添加讲师的方法
    @ApiOperation(value = "添加讲师")
    @PostMapping("addTeacher")
    public R addTeacher(@RequestBody EduTeacher eduTeacher){
        boolean save = teacherService.save(eduTeacher);
        if (save){
            return R.ok();
        } else {
            return R.error();
        }
    }

    //6.根据讲师名进行查询
    @ApiOperation(value = "查询讲师")
    @GetMapping("getTeacher/{id}")
    public R getTeacher(@PathVariable String id){
        EduTeacher eduTeacher = teacherService.getById(id);
        return R.ok().data("teacher",eduTeacher);
    }

    //7.讲师修改功能
    @ApiOperation(value = "修改讲师")
    @PostMapping("updateTeacher")
    public R updateTeacher(@RequestBody EduTeacher eduTeacher){
        boolean flag = teacherService.updateById(eduTeacher);
        if (flag) {
            return R.ok();
        } else {
            return R.error();
        }
    }

}

